General Science Class 10

The presence of a dielectric between the plates of capacitors, the capacitance of capacitor :

1. Increases
2. Remain constant
3. Decreases
4. Remain uncharged

If the area of the parallel plate capacitor is doubled then the capacitance will be :

1. Remain uncharged
2. Half
3. Double
4. Increased two times

In an Electric circuit when Electrons move from low to high potential they will :

1. Gain Energy
2. Lose their identity
3. Lose Energy
4. Gain Potential

In an electric circuit an ammeter is always connected in :

1. Series
2. Parallel
3. Mixed
4. None

Resistance of a conductor does not depend on :

1. Length of the conductor
2. Area of crossection
3. Density
4. Resistivity

The condition when the resistance of a circuit is zero is known as?

1. Closed-circuit
2. Short circuit
3. Open circuit
4. Zero circuit

The condition for the validity of Ohm's law is that the :

1. Temperature should remain constant
2. Current should be proportional to voltage
3. Resistance must be wire wound type
4. All of the above

Ohm's law is not applicable to :

1. D.C. circuits
2. Small resistors
3. High currents
4. Semiconductors

Two resistances of 6 Ω and 12 Ω are connected in parallel. Their net resistance is :

1. 7 Ω
2. 6 Ω
3. 4 Ω
4. 5 Ω