GTHS ADIMALI

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GTHS ADIMALI

STANDARD 10 PHYSICS TEST-UNIT-3 SCORE 20

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Name of the school *

1. Identify the condition in which the galvanometer needle does not defect

1 point

North pole of the magnet is moved into the solenoid

The south pole of the magnet is moved into the solenoid

The solenoid is moved keeping the magnet stationary

Magnet, solenoid are moved on the same plane in same direction at the same speed

Clear selection

2.Name the phenomenon based on this picture

1 point

self induction

electromagnetic induction

mutual induction

none of these

Clear selection

3.Which is the rule related to the following picture

1 point

Flemings left hand rule

Motor Principle

Right Hand Thumb rule

Fleming's right hand and rule

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4.Find the odd one

1 point

Generator

cycle dynamo

Transformer

Inductor

Moving coil microphone

Clear selection

5.During the rotation of an armature of an AC generator ,When the angle is 270 degree, the induced emf generated is

1 point

minimum

maximum

none of these

Clear selection

6.When 50 Hz AC is used how many times the direction of current changes in the circuit

1 point

150

100

200

Clear selection

7.By using the figure find the odd one

1 point

Brushes

Split rings

slip rings

field magnet

armature

Clear selection

8.Which of the phenomenon is represented by the following picture and induced current in the secondary coil increases while,

1 point

mutual induction,DC uses inthe primary, soft iron core inserted into the coil

selfinduction ,AC uses in the primary, soft iron core inserted into the coil

mutual induction ,AC uses in the primary , soft iron core is inserted into the coil

self induction DC used in the primary,soft iron core inserted into the coil

Clear selection

9.Find the odd one

1 point

DC generator

cell/battery

solar cell/solar panel

cycle dynamo

Clear selection

10.Electromagnetic Induction is

1 point

formation of back emf in the coil

formation of induced emf in the coil

changing of current into one direction only

Breaking of current if an excess current flows through it

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11.Find the statement that is not related to the working of moving coil microphone

1 point

voice coil vibrates

diaphragm vibrates

electrical signals are produced

sound signals are produced

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12.Inductors are used in the AC circuits to,

1 point

regulate current

change the direction of current

break the current

amplify the current

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13.Primary voltage of a transformer is 240V and the secondary voltage is 12V. if the number of turns in the primary is 3800 ,calculate the number of turns in the secondary? If 50Hz current of .2A flows through the primary ,find the current in the secondary

2 points

195, 4.5A

200, 4A

190, 4A

196 ,4.2A

Clear selection

14.In A building 5 LED bulbs each of power 8 W, works for 5 hours.5 fans each of 60 W works for 5 hours and a TV of 100 W works for 3 hours in a day.Find the daily consumption of current

2 points

2 unit

1.8

2.5

2.2

Clear selection

15.Name the device that converts AC into DC

1 point

MCB

Resistor

inductor

rectifier

galvanometer

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16.Identify the following component

1 point

multimeter

MCB

RCCB

switch board

Meter

Clear selection

17.From the picture identify the earth pin

1 point

None of these

Clear selection

18.Which of them not belong to others

1 point

calculator

mobile phone

radio

tape recorder

mixie

Clear selection

Prepared by Beena KA

GTHS Adimaly

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