In the above question, potential difference across the 40Ω resistance will be
|
(a) Zero |
(b) 80 V |
(c) 40 V |
(d) 120 V |
In the above question, potential difference across the 40Ω resistance will be
|
(a) Zero |
(b) 80 V |
(c) 40 V |
(d) 120 V |
(a) Zero
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Focal length of a plane mirror is
|
(a) Zero |
(b) Infinite |
(c) Very less |
(d) Indefinite |
Wavefront means
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(a) All particles in it have same phase |
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(b) All particles have opposite phase of vibrations(c) Few particles are in same phase, rest are in opposite phase |
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(c) Few particles are in same phase, rest are in opposite phase |
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(d) None of these |
Assertion : An electron and proton enters a magnetic field with equal velocities, then, the force experienced by the proton will be more than electron.
Reason : The mass of proton is 1837 times more than electron.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If assertion is false but reason is true. |
In an induction coil, the secondary e.m.f. is
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(a) Zero during break of the circuit |
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(b) Very high during make of the circuit |
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(c) Zero during make of the circuit |
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(d) Very high during break of the circuit |
For depositing 1 gm of Cu in copper voltameter on passing 2 amperes of current, the time required will be (For copper Z = 0.00033 gm/C)
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(a) Approx. 20 minutes |
(b) Approx. 25 minutes |
(c) Approx. 30 minutes |
(d) Approx. 35 minutes |
An ammeter of 100 W resistance gives full deflection for the current of 10–5 amp. Now the shunt resistance required to convert it into ammeter of 1 amp. range, will be
|
(a) |
(b) |
(c) |
(d) |
If 3 charges are placed at the vertices of equilateral triangle of charge ‘q’ each. What is the net potential energy, if the side of equilateral ∆ is l cm
|
(a) |
(b) |
(c) |
(d) |