46.When a wire loop is rotated in a magnetic field, the direction of induced emf changes in every:- (1) one revolution (2) 1/2 revolution (3) 1/4 revolution (4) 2 revolution

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Q. Question 4
Choose the correct option.
A rectangular coil of copper wires is rotated in a magnetic field. The direction of the induced current changes once in each
(a) two revolutions
(b) one revolution
(c) half revolution
(d) one-fourth revolution

Q. When a wire loop is rotated in a magnetic field, the direction of induced emf changes in every

Q. Where will the hand of a clock stop if it

a)Starts at

12

and makes

\frac{1}{2}

of a revolution, clockwise?

b)Starts at

2

and makes

\frac{1}{2}

of a revolution, clockwise?

c)Starts at

5

and makes

\frac{1}{4}

of a revolution, clockwise?

d)Starts at

5

and makes

\frac{3}{4}

of a revolution, clockwise?

Which direction will you face if you start facing

(a) East and make of a revolution clockwise?

(b) East and make of a revolution clockwise?

(d) South and make one full revolution?

(Should we specify clockwise or anti-clockwise for this last question? Why not? )

Question 1

Match the following:

(i) Straight angle (a) less than one-fourth a revolution
(ii) Right angle (b) more than half a revolution
(iii) Acute angle (c) half of a revolution
(iv) Obtuse angle (d) one-fourth a revolution
(v) Reflex angle (e) between $\frac{1}{4}$ and $\frac{1}{2}$ of a revolution
(f) One complete revolution

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