Two resistors, A of 6 Ω and B of 12 Ω, are connected in parallel to a battery of 3 V. The total energy supplied by the battery to the circuit in 1 second is ?
A2.25 J
B0.75 J
C1.5 J
D4.5 J
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A current-carrying straight conductor is placed in a magnetic field. The conductor experiences the maximum force when the angle between the direction of the current in it and the direction of the magnetic field is?
Consider the following statements about magnetic field due to a current-carrying straight conductor: Which of the above statements is/are correct?
- (a) The direction of the south pole of a compass needle at a point gives the direction of the magnetic field at that point.
- (b) The direction of the magnetic field lines gets reversed if the direction of the current in the conductor is reversed.
The potential difference across a copper wire is 5.0 V when a current of 0.5 A flows through it. The resistance of the wire is?
A galvanometer when connected in a circuit, detects the presence of?