The set up in the figure is used to study the relationship between current (I) and potential difference (V) for a wire X. The most likely shape of the graph of the potential difference (Y) against current (X) for the copper wire is:
B.
D.
A.
C.
An impulse of 100 N is applied to an object.
If this same impulse is delivered over a longer time interval:
The momentum transferred will be decreased.
The force involved will be decreased.
The momentum transferred will be increased.
The force involved will be increased.
An ammeter of full scale deflection 5.00 mA is being used to read a current of size 5.00 A.
This can be achieved by:
Connecting it in parallel with a resistance of 0.49 Ω.
Connecting it in parallel with a resistance of 0.02 Ω.
Connecting it series with a resistance of 980.00 Ω.
Connecting it in parallel with a resistance of 49.95 Ω.
The value of X for which the galvanometer in the figure shows a null deflection is:
4Ω.
8Ω.
4.5 Ω.
1Ω.
The set up in the figure is used to study the relationship between current (I) and potential difference (V) for a wire X.
If the material X is a copper wire, the relationship between V and I when the switch is closed at constant temperature is:
Hooke’s law.
Lenz’s law.
Coulomb’s law.
Ohm’s law.
