GAT Test - 9...

The equivalent resistance of the resistances (two) joined in parallel is 6/5 Ω. When one of the resistance wire is broken, the effective resistance becomes 2Ω. The resistance of the wire that got broken was :

Which of the law states that in any closed circuit the current is directly proportional to the voltage, provided the physical conditions of the circuit are kept constant?

An electric heater of 1000 W at 200 V rating is used in a circuit with a supply of 400 V. Find the external resistance R that should be added in series with the heater so it delivers 1000W power?

If the potential difference V applied across a conductor is increased to 2V with its temperature kept constant, the drift velocity of the free electrons in a conductor will-

When we add aluminium foil to freshly prepared sodium hydroxide solution a gas is produced. Which of the following correctly states the property of this gas ?

Atomic hydrogen recombines to give molecular hydrogen and a large amount of heat in a very fast reaction and can also be used for welding metals. This is because ________________.

The following table given the mass and volume of 3 immiscible liquids X, Y and Z.

Equal quantities of liquids are poured in a test tube containing 5 ml of water. What will be the order of liquids settled from top to bottom?

Consider density of water as lglcm³

Which one of the following alloys contains a non-metal as one of its constituents?

A boy has a thick paste of turmeric. On adding this paste to hydrochloric acid and aqueous solution of sodium hydroxide separately, what colour(s) would he observe?

Read the following examples from daily life and select the appropriate option"

A. When food gets spoiled, it produces a foul smell.

B. A slice of apple acquires brown colour when kept out for some time.

C. When an ant bites, calamine is used to ease the irritation on the skin.