#### 12th Standard Physics English Medium Free Online Test Creative 1 Mark questions - Part Five

12th Standard

Reg.No. :
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Physics

Time : 00:10:00 Hrs
Total Marks : 10
10 x 1 = 10
1. The unit for electric susceptibility is

(a)

Nm2 C-2

(b)

C2 N-1 m-2

(c)

C-2Nm2

(d)

N-1 m-2C2

2. In an electrical arrangement as shown the equivalent resistance between X and Y will be

(a)

$158.75\Omega$

(b)

$118.75\Omega$

(c)

$218.75\Omega$

(d)

$318.75\Omega$

3. Parts of the energy is used in an electric motor and the remaining part of the energy is dissipated in form of

(a)

current in the resistors

(b)

heat in the resistor

(c)

voltage in the resistors

(d)

resistance in the resistor

4. The magnitude of the induced emf in a conductor depends on the

(a)

flux density of the magnetic field

(b)

amount of flux cut

(c)

(d)

rate of change of flux

5. Speed of electromagnetic waves through vacuum is equal to

(a)

$\sqrt { { \mu }_{ 0 }{ \varepsilon }_{ 0 } }$

(b)

$\frac { 1 }{ \sqrt { { \mu }_{ 0 }{ \varepsilon }_{ 0 } } }$

(c)

$\\ \frac { \sqrt { { \mu }_{ 0 } } }{ { \varepsilon }_{ 0 } }$

(d)

$\sqrt { \frac { { \varepsilon }_{ 0 } }{ { \mu }_{ 0 } } }$

6. A ray of light travels from A to B with uniform speed. On its way it is reflected by the surface XX'. The path followed by the ray to take least times is

(a)

1

(b)

2

(c)

3

(d)

4

7. According to Einstein's photoelectric equation. the plot of the K.E of the emitted photoelectrons from a metal vs the frequency of incident radiation gives a straight line where slope

(a)

depends on the nature ofthe metal used

(b)

depends on the intensity of the radiation

(c)

both a & b

(d)

Depends on neither a or b

8. The number of de Brogle waves of an electron in the nth orbit of an atom is

(a)

n

(b)

n-1

(c)

n+1

(d)

2n

9. In Millikan's oil drop experiment, charged drop is balanced between the two plates. Now the viscous force

(a)

acts downwards

(b)

acts upwards

(c)

is zero

(d)

acts either upwards or downwards

10. A p-n diode can be used as

(a)

condenser

(b)

amplifier

(c)

rectifier

(d)

regulator