Quiz Question Answer 10+2

Quiz Question Answer

Comment answers

1.     When a dielectric slab is introduced between the plates of a parallel plate capacitor,  its capacitance is

a.     Decreases                                     b. Increases

C. no effect                                   d. become 3 times

2.     Name the physical quantity, whose SI unit is volt per metre

a.     Magnetic field

b.     Electric field intensity

c.      Capacitance

d.     Inductance

3.     What is the effect of rise in temperature on the conductivity of  conductors?

a.     Increases

b.     No effect

c.      Become four times

d.     Decreases

4.     Cyclotron cannot accelerate

a.     Positive ions

b.     Protons

c.      Electrons

d.     Alpha particles

5.     How will you convert a galvanometer into ammeter?

a.     A small resistance connected in parallel

b.     A large resistance connected in parallel

c.      A large resistance connected in series

d.     A small resistance connected in series

6.     The transformer cores are made up of material which has

a.     High retentivity and high coercivity

b.     Low  retentivity and high coercivity

c.      Low  retentivity and low coercivity

d.     High retentivity and low coercivity

7.     Alternating current (ac) can be easily passed through

a. capacitor

b. inductor

c. both

d. none of the above

8.     Which part of electromagnetic spectrum has largest penetrating power

a. visible rays

b. gamma rays

c. microwaves

d. infrared rays

9.     How does the frequency of light changes when it goes from air into glass

a.     Increases

b.     No effect

c.      Become four times

d.     Decreases

10.                        Interference occurs in which of the following waves?

a.     Longitudinal

b.     Transverse

c.      Electromagnetic

d.     All of these

11.     Mirage is a phenomenon of

a.     Reflection of light

b.     Refraction of light

c.      Total internal reflection of light

d.     Diffraction of light

12.     The image formed by an objective of a compound microscope is

a.     Virtual and diminished

b.     Real and diminished

c.      Real and enlarged

d.     Virtual and enlarged

13.     The device that can act as a complete electronic circuit is

a.     Junction diode

b.     Integrated circuit

c.      Junction transistor

d.     Zener diode

14.     What is the charge on p type semiconductor

a.     Negative

b.     Neutral

c.      Positive

d.     None of these