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2022 54 questions

Q512022 · 27 Jul 2022 · Shift 1· Numerical answer
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Answer: 2400
Q352022 · 27 Jul 2022 · Shift 2
The velocity of the bullet becomes one third after it penetrates 4 cm in a wooden block. Assuming that bullet is facing a constant resistance during its motion in the block. The bullet stops completely after travelling at (4 + x) cm inside the block. The value of x is :
1. A.2.0
2. B.1.0
3. C.0.5
4. D.1.5
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Answer: C
Q402022 · 27 Jul 2022 · Shift 2
(A) The drift velocity of electrons decreases with the increase in the temperature of conductor. (B) The drift velocity is inversely proportional to the area of cross-section of given conductor. (C) The drift velocity does not depend on the applied potential difference to the conductor. (D) The drift velocity of electron is inversely proportional to the length of the conductor. (E) The drift velocity increases with the increase in the temperature of conductor. Choose the correct answer from the options given below :
1. A.(A) and (B) only
2. B.(A) and (D) only
3. C.(B) and (E) only
4. D.(B) and (C) only
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Answer: B
Q522022 · 27 Jul 2022 · Shift 2· Numerical answer
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Answer: 40
Q382022 · 26 Jul 2022 · Shift 1
1. A. $10 A$
2. B. $20 A$
3. C. $4 A$
4. D. $40 A$
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Answer: A
Q552022 · 26 Jul 2022 · Shift 1· Numerical answer
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Answer: 20
Q562022 · 26 Jul 2022 · Shift 1· Numerical answer
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Answer: 44
Q402022 · 25 Jul 2022 · Shift 2
1. A. $50 V$
2. B. $75 V$
3. C. $150 V$
4. D. $275 V$
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Answer: D
Q462022 · 25 Jul 2022 · Shift 2
The maximum error in the measurement of resistance, current and time for which current flows in an electrical circuit are $1%$ , $2%$ and $3%$ respectively. The maximum percentage error in the detection of the dissipated heat will be :
1. A.2
2. B.4
3. C.6
4. D.8
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Answer: D
Q552022 · 25 Jul 2022 · Shift 2· Numerical answer
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Answer: 25
Q582022 · 25 Jul 2022 · Shift 2· Numerical answer
Magnetic flux (in weber) in a closed circuit of resistance $20 Ω$ varies with time t(s) at $ϕ = 8 t^{2} - 9 t + 5$ . The magnitude of the induced current at $t = 0.25 s$ will be ___________ mA.
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Answer: 250
Q592022 · 25 Jul 2022 · Shift 2· Numerical answer
In a potentiometer arrangement, a cell of emf 1.20 V gives a balance point at 36 cm length of wire. This cell is now replaced by another cell of emf 1.80 V. The difference in balancing length of potentiometer wire in above conditions will be ___________ cm.
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Answer: 18
Q442022 · 30 Jun 2022 · Shift 1
An electric cable of copper has just one wire of radius $9 mm$ . Its resistance is $14 Ω$ . If this single copper wire of the cable is replaced by seven identical well insulated copper wires each of radius $3 mm$ connected in parallel, then the new resistance of the combination will be :
1. A. $9 Ω$
2. B. $18 Ω$
3. C. $28 Ω$
4. D. $126 Ω$
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Answer: B
Q582022 · 30 Jun 2022 · Shift 1· Numerical answer
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Answer: 125
Q602022 · 30 Jun 2022 · Shift 1· Numerical answer
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Answer: 2
Q412022 · 28 Jun 2022 · Shift 2
Resistance of the wire is measured as $2 Ω$ and $3 Ω$ at $1 0^{\circ} C$ and $3 0^{\circ} C$ respectively. Temperature co-efficient of resistance of the material of the wire is :
1. A. $0.033^{\circ} C^{- 1}$
2. B. $- 0.033^{\circ} C^{- 1}$
3. C. $0.011^{\circ} C^{- 1}$
4. D. $0.055^{\circ} C^{- 1}$
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Answer: A
Q522022 · 28 Jun 2022 · Shift 2· Numerical answer
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Answer: 2
Q552022 · 28 Jun 2022 · Shift 2· Numerical answer
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Answer: 8
Q362022 · 27 Jun 2022 · Shift 1
A $72 Ω$ galvanometer is shunted by a resistance of $8 Ω$ . The percentage of the total current which passes through the galvanometer is :
1. A. $0.1%$
2. B. $10%$
3. C. $25%$
4. D. $0.25%$
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Answer: B
Q412022 · 27 Jun 2022 · Shift 1
The current flowing through an ac circuit is given by $I = 5 sin (120 π t) A$ How long will the current take to reach the peak value starting from zero?
1. A. $\frac{1}{60} s$
2. B. $60 s$
3. C. $\frac{1}{120} s$
4. D. $\frac{1}{240} s$
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Answer: D
Q512022 · 27 Jun 2022 · Shift 1· Numerical answer
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Answer: 975
Q592022 · 27 Jun 2022 · Shift 1· Numerical answer
A cell, shunted by a $8 Ω$ resistance, is balanced across a potentiometer wire of length $3 m$ . The balancing length is $2 m$ when the cell is shunted by $4 Ω$ resistance. The value of internal resistance of the cell will be ____ $Ω$ .
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Answer: 8
Q572022 · 27 Jun 2022 · Shift 2· Numerical answer
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Answer: 3
Q412022 · 26 Jun 2022 · Shift 1
The magnetic flux through a coil perpendicular to its plane is varying according to the relation $ϕ = (5 t^{3} + 4 t^{2} + 2 t - 5)$ Weber. If the resistance of the coil is 5 ohm, then the induced current through the coil at t = 2 s will be,
1. A.15.6 A
2. B.16.6 A
3. C.17.6 A
4. D.18.6 A
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Answer: A
Q422022 · 26 Jun 2022 · Shift 1
An aluminium wire is stretched to make its length, 0.4% larger. The percentage change in resistance is :
1. A.0.4%
2. B.0.2%
3. C.0.8%
4. D.0.6%
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Answer: C