SL Arora 11th Physics. We covered all the SL Arora 11th Physics MCQs in this post for free so that you can practice well for the exam.
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SL Arora 11th Physics Objective for Students
A dynamo dissipates 20 watts when it supplies a current of 4 amps through it. If the terminal potential difference is 220V, what is the EMF produced?
a. 220 volts
b. 225 volts
c. 200 volts
d. 100 volts
Option b – 225 volts
Lenz’s law is a consequence of the law of conservation of
a. mass
b. charge
c. energy
d. None
Option b – charge
The self-inductance of a straight wire is
a. positive
b. negative
c. zero
d. None of these
Option c – zero
The device that does not work on the principle of mutual induction is
a. Transformer
b. Tesla coil
c. motor
d. induction coil
Option a – Transformer
A coil of wire of radius r has 600 turns and a self-inductance of 108 mH. The self-inductance of a similar coil of 500 turns will be
a. 108 mH
b. 90 mH
c. 75 mH
d. None
Option c – 75 mH
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