If the plane of the rectangular coil is parallel to the magnetic field (i.e radial magnetic field) the torque on the coil is_____________________?
A. τ = NIAB cosφ B. τ = NIAB sinφ C. τ = NIAB tanφ D. τ = NIAB
Physics MCQs with Answers
Magnetic flux and flux density are related by___________________?
A. magnetic flux = flux density / area B. magnetic flux = flux density x area C. flux density = magnetic flux area D. flux density = magnetic flux x area
The charged particle enters the uniform magnetic field in such a way that its initial velocity is not perpendicular to the field the orbit will be__________________?
A. a circle B. a spiral C. an ellipse D. helix
Value of permeability of free space in SI units is___________________?
A. 4πx10-9 WbA-1m-1 B. 4πx10-7 WbA-1m-1 C. 4πx10-10 WbA-1m-1 D. 4πx10-8 WbA-1m-1
The magnetic field strength of solenoid is__________________?
A. B = μNI B. B = μN/I C. B = μnI D. Both B and C
The sensitivity of a galvanometer is given by__________________?
A. C/BAN B. CAN/B C. BAN/C D. ABC/N
Minimum current required to produce a deflection of 1 mm on a scale at a distance of 1 meter is__________________?
A. 0.1 A B. 1:00 AM C. current sensitivity D. 1 m A
While measuring the unknown resistance the help of slide wire bridge a greatest accuracy can be achieved when__________________?
A. a most sensitive galvanometer is used B. a steady voltage cell is used C. the balance point is close to the middle of the wire D. a high resistance box is used in one of its gap
An ammeter measures the total current flowing through a circuit when it is connected__________________?
A. in series with the circuit B. in parallel with circuit C. in series with any of the parallel resistances in the circuit D. in parallel with any of the series resistances in the circuit