Question

0.1.(A) Choose the correct alteruntive.
151
If a man weighs 60 kg on the surface of Earth, what will be his
weight when he is taken to the centre of Earth?
a 120k b oky & Okg d. 30 kg
method of separation of metals is based on the
working of a mill
a Wilfley table
b. Magnetic
c: Hydraulic
d. Froth floatation
in. If metal A displaces another metal B from the solution of its
salt, then it means that
a. metal B is more reactive than metal A.
b. metal A is more reactive than metal B.
c. there is no difference in the reactivity of both the metals.
d. none of the given options.
iv. If we reverse the direction of the current in the circuit, the
deflection in the compass needle gets
a. reversed
vb. increased
c. decreased
d. none of these
At what distance should a watch-maker hold his lens from the
watch?
a. At the focal length
b. At less than focal length
c. At more than the focal length d. At zero distance
(5)​

Answer 1

Answer:

2) answer froth floatation 4) answer increase 5) answer at less than focal length