- AMass disappears to reappear as energy.
- BEnergy disappears to reappear as mass.
- CMass and energy are two different forms of the same entity.
- DMass and energy can never be related to each other.
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The emf of a battery is 2 V and its internal resistance is 0.5 W. The maximum power which it can deliver to any external circuit will be
|
(a) 8 Watt |
(b) 4 Watt |
(c) 2 Watt |
(d) None of the above |
The points resembling equal potentials are
|
(a) P and Q |
(b) S and Q |
(c) S and R |
(d) P and R |
A sinusoidal voltage of peak value 200 volt is connected to a diode and resistor R in the circuit shown so that half wave rectification occurs. If the forward resistance of the diode is negligible compared to R the rms voltage (in volt) across R is approximately
|
(a) 200 |
(b) 100 |
(c) |
(d) 280 |
The period of oscillation of a vibration magnetometer depends on which of the following factors
| (a) I and M only | (b) M and H only | (c) I and H only | (d) I, M and H only |
Rest mass energy of an electron is 0.51 MeV. If this electron is moving with a velocity 0.8 c (where c is velocity of light in vacuum), then kinetic energy of the electron should be.
|
(a) 0.28 MeV |
(b) 0.34 MeV |
(c) 0.39 MeV |
(d) 0.46 MeV |
Which of the following helps us in the determination of the temperature of sun
|
(a) Kirchhoff's law |
(b) Maxwell Boltzmann law |
|
(c) Planck's law |
(d) Stefan's law |