Q. How is the ammeter connected in all circuits to measure current flowing in it?
1) In parallel
2) Across
3) In series
4) In line
Q. If a convex lens forms a real inverted same size image at 30 cm, then the object is placed ......... in front of the lens.
1) 30 cm
2) 40 cm
3) 10 cm
4) 20 cm
Q. If the frequency of a sound wave is 100 Hz, then what is its time period?
1) 0.1 second
2) 0.01 second
3) 10 seconds
4) 1 second
Q. Which of the following is TRUE about the process of evaporation?
1) It does not depend upon humidity level
2) It increases with increase in surface area
3) It decreases with increase in wind speed
4) It decreases with increase in temperature
Q. CGS system of measurement units stands for -
1) Coulomb, Gauss, Steradian
2) Celsius, Grade, Second
3) Centiliter, Gallon, Siemens
4) Centimeter, Gram, Second
Q. Which form of energy causes a matchstick to ignite into a bright flame when the matchstick is struck against the match box surface?
1) Potential energy
2) Kinetic energy
3) Chemical energy
4) Wind energy
Q. Sound cannot travel through -
1) Gas
2) Vacuum
3) Liquid
4) Metal
Q. A 100 W electric bulb is used for 10 hours a day. How many units of energy are consumed in 30 days?
1) 1
2) 10
3) 30
4) 300
Q. An echo is heard after 5 seconds of the production of sound which moves with a speed of 340 m/s. What is the distance of the mountain from the source of sound which produced the echo?
1) 0.085 km
2) 0.85 km
3) 0.17 km
4) 1.7 km
Q. A car undergoes a uniform circular motion. The acceleration of the car is -
1) zero
2) a non-zero constant
3) a non-zero but not a constant
4) None of the above
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