EASY
JEE Main
IMPORTANT
Earn 100

A spectrometer gives the following reading when used to measure the angle of the prism:
main scale reading =58.5 degree, vernier scale reading =9 division. Given that one division on main scale corresponds to 0.5 degree, 30 division of vernier scale matches with 29 division of main scale. The angle of prism from above data:

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Important Questions on Physics and Measurement

MEDIUM
JEE Main
IMPORTANT
Physics Crash Course JEE Main>Chapter 1 - Physics and Measurement>Level 1>Q 34
It is known that for a simple pendulum, time period is given by T=2πLg. If the measured value of L is 10 cm known to 1 mm accuracy and also time for 100 oscillations of the pendulum is found to be 50 s using a wrist watch of 1 s resolution, then find the error in the determination of g.
EASY
JEE Main
IMPORTANT
Physics Crash Course JEE Main>Chapter 1 - Physics and Measurement>Level 1>Q 35
Identify the instrument having minimum least count out of the following options.
EASY
JEE Main
IMPORTANT
Physics Crash Course JEE Main>Chapter 1 - Physics and Measurement>Level 1>Q 36

What is the number of significant figures in 0.310×103?

EASY
JEE Main
IMPORTANT
Physics Crash Course JEE Main>Chapter 1 - Physics and Measurement>Level 1>Q 37
Using a screw gauge, the observation of the diameter of a wire are 1.324, 1.326, 1.334 and 1.336 cm respectively. Then choose the incorrect option.
EASY
JEE Main
IMPORTANT
Physics Crash Course JEE Main>Chapter 1 - Physics and Measurement>Level 1>Q 38
The least count of the main scale of a vernier callipers is 0.5 mm and the least count of the vernier callipers itself is 0.005 cm. Then the number of division on vernier scale is
MEDIUM
JEE Main
IMPORTANT
Physics Crash Course JEE Main>Chapter 1 - Physics and Measurement>Level 1>Q 39

In two different systems of units, acceleration is represented by the same number while velocity is represented by numbers in the ratio 1:3. The ratios of unit of length and time are, respectively,

EASY
JEE Main
IMPORTANT
Physics Crash Course JEE Main>Chapter 1 - Physics and Measurement>Level 1>Q 40
The angular diameter of the sun is 1920". If the distance of the sun from the earth is 1.5×1011 m, then the linear diameter of the sun is
EASY
JEE Main
IMPORTANT
Physics Crash Course JEE Main>Chapter 1 - Physics and Measurement>Level 1>Q 41
What is the percentage error in calculating the value of area of a cylinder if its length is measured to be 5.0 cm with a metre scale having least count 0.1 cm. Its diameter is 5 cm measured with vernier callipers having least count 0.01 cm.