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Tests
Name:
Basic Test
Created By:
V. Gokal
Max Time:
2 mins
Select an option for each question and click Submit
1. The stationary spring-loaded trolleys in the diagram have just "exploded" apart on a level bench. After the spring has expanded, which of the following is true for the total momentum and total kinetic energy of the two trolleys?
increases | increases
remains zero | increased
increases | remains zero
remains zero | remains zero
2. A space craft is made up of two modules, P and Q, with masses of 2m and m respectively. It is traveling at a velocity v relative to the Earth. Module P is then ejected backwards so that it has zero velocity relative to the Earth. The magnitude of the velocity of Q would be ...
0
2v
3v
5v
3. Two identical resistors labeled R are connected in parallel to a cell having internal resistance. When the switch S is closed, :
ammeter increases | voltmeter decreases
ammeter decreases | voltmeter increases
ammeter increases | voltmeter increases
ammeter decreases | voltmeter decreases
4. Two spring balances are tied to each other. A force of 20N is applied as shown. What would be the readings on the spring balances in newtons (in order of XY)?
10 and 10
20 and 20
0 and 20
20 and 0
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