Physics Quiz Set 10

Question No.1

The property of persistence of vision is used in_______

1. Short sightedness
2. Long sightedness
3. Cinematography
4. Colour vision

Select Answer

Correct Answer: ( C )  

Question No.2

The change of focal length of an eye lens to focus the image of objects at varying distances is done by the action of the ____

1. Pupil
2. Retina
3. Cilliary Muscle
4. Blind Spot

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Correct Answer: ( C )  

Question No.3

1 Ampere equals to________

1. 10 mA
2. 100 mA
3. 1000 mA
4. 0.1 mA

Select Answer

Correct Answer: ( C )  

Question No.4

A battery of 10 V is connected in series with resistors of 1 ohm, 2 ohm, 3, ohm and 4 ohm. Then How much current would flow through the resistor of 3 ohm?

1. 1 Ampere
2. 2 Ampere
3. 3 Ampere
4. 4 Ampere

Select Answer

Correct Answer: ( A )  

Question No.5

No force acts on a current carrying conductor when it's placed

1. Parallel to the magnetic field
2. Perpendicular to the magnetic field
3. Far away from the magnetic field
4. Inside a magnetic field

Select Answer

Correct Answer: ( A )  

Question No.6

In a hydroelectric power plant more electric power can be generated if water falls from a greater height because___________

1. Larger amount of potential energy is converted into K.E.
2. The water molecule breaks into ions.
3. More height of water contains more electricity
4. All of these

Select Answer

Correct Answer: ( A )  

Question No.7

An object 12 cm in front of a convex mirror forms an image 6 cm behind mirror. Then the focal length of mirror is_________

1. -12 cm
2. +12 cm
3. -10 cm
4. +10 cm

Select Answer

Correct Answer: ( )  

Question No.8

A convex lens of suitable focla length is used for correcting _______

1. Myopia
2. Hypermetropia
3. Both A and B
4. None of these

Select Answer

Correct Answer: ( B )  

Question No.9

Fuel used in thermal power plant is

1. Uranium
2. Water
3. Fossil fuels
4. Biomass

Select Answer

Correct Answer: ( C )  

Question No.10

If there are THREE resistances each of 2 ohm generating the effective resistance of 3 ohm, how will the connection of the THREE resistances in the circuit be made?

1. A series combination of two resistance and one in parallel
2. A parallel combination of two resistance and one in series
3. Three are in parallel
4. Three are in series

Select Answer

Correct Answer: ( B )  

Question No.11

Strength of electromagnet can be increased by introducing a soft iron core_______

1. Inside the coil
2. Outside the coil
3. Round the coil
4. Above the coil

Select Answer

Correct Answer: ( A )  

Question No.12

What will be the combined magnification of two lenses having individual magnification 2X and -3X respectively?

1. 1X
2. -3X
3. 5X
4. -6X

Select Answer

Correct Answer: ( D )  

Question No.13

Twinkling of stars, apparent sunrise and sunset can be explained by the phenomenon of________

1. Total internal reflection
2. Atmospheric dispersion
3. Atmospheric reflection
4. Atmospheric refraction

Select Answer

Correct Answer: ( D )  

Question No.14

What will be the combined focal length if two lenses of power -1.65D and +2.65D are placed in contact?

1. 50 cm
2. 100 cm
3. 65 cm
4. None of these

Select Answer

Correct Answer: ( B )  

Question No.15

Light rays travelling parallel to principal axis of a convex lens after refraction meet at a point on principal axis which is called_______

1. Optical centre
2. Principal focus
3. Focal length
4. Principal axis

Select Answer

Correct Answer: ( B )  

Question No.16

If an alpha particle diverted towards west is deflected towards north by a Magnetic field, What will be the direction of Magnetic field?

1. Toward South
2. Toward East
3. Down ward
4. Upward

Select Answer

Correct Answer: ( D )  

Question No.17

A concave mirror gives real, inverted and same sized image if the object is placed

1. At Focus
2. At Infinity
3. At Centre of curvature
4. Beyond Centre of curvature

Select Answer

Correct Answer: ( )  

Question No.18

An electric fuse is based on

1. The heating effect of the current
2. The magnetic effect of the current
3. The chemical effect of the current
4. None of these

Select Answer

Correct Answer: ( A )  

Question No.19

What will be the energy consumed by 150W toaster in 20 minutes?

1. 150 KJ
2. 180 KJ
3. 300 KJ
4. 144 KJ

Select Answer

Correct Answer: ( B )  

Question No.20

What will be the Resistance of a resistor connected to a battery of 50V and flow of current 100 mA ?

1. 5000 ohm
2. 20 ohm
3. 500 ohm
4. 2 ohm

Select Answer

Correct Answer: ( C )  

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