When a negative charge is taken at a height from earth's surface, then its potential energy
|
(a) Decreases |
(b) Increases |
|
(c) Remains unchanged |
(d) Will become infinity |
(b) Increases
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A silver voltameter of resistance 2 ohm and a 3 ohm resistor are connected in series across a cell. If a resistance of 2 ohm is connected in parallel with the voltameter, then the rate of deposition of silver
|
(a) Decreases by 25% |
(b) Increases by 25% |
|
(c) Increases by 37.5% |
(d) Decreases by 37.5% |
Moment of inertia of a magnetic needle is 40 gm-cm2 has time period 3 seconds in earth's horizontal field = 3.6 
weber/m2. Its magnetic moment will be
(a) 0.5 
|
(b) 5
|
(c) 0.250
|
(d) 5 
|
What will be the angular momentum of a electron, if energy of this electron in H-atom is 1.5eV (in J-sec)
|
(a) 1.05 |
(b) 2.1 |
(c) 3.15 |
(d) -2.1 |
Constantan wire is used in making standard resistances because its
|
(a) Specific resistance is low |
|
(b) Density is high |
|
(c) Temperature coefficient of resistance is negligible |
|
(d) Melting point is high |
