4251: Assertion (A)
In our houses, the current in AC electricity line changes direction 60 times per second.
Reason (R):
The frequency of alternating voltage supplied is 60 hertz.
(a) Both A and R are individually true and R is the correct explanation of A
(b) Both A and R are individually true but R is not the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
4252: In a school, out of 40 staff members, 30 are males. Some of the female teachers can sing while no male can sing. The principal invited six persons to a party by drawing lots. It was found that no member in the party could sing. Which of the following conclusions can be definitely drawn?
(a) Only males were invited to the party
(b) Some of the invitees were males and some were females who could not sing
(c) Only females, who could not sing, were invited to the party
(d) None of the above
4253: Which one of the following countries is the leading producer of uranium?
(a) United States of America
(b) Zambia
(c) Canada
(d) Germany
4254: Consider the following countries:
1. Australia
2. Namibia
3. Brazil
4. Chile
Through which of the above does the Tropic of Capricorn pass?
(a) 1 only
(b) 1, 2, 3
(c) 2, 3, 4
(d) 1, 2, 3, 4
4255: Local supply of coal is not available to
(a) TISCO, Jamshedpur
(b) VSL, Bhadravati
(c) HSL, Durgapur
(d) HSL, Bhilai