1
IIT-JEE 1980
MCQ (Single Correct Answer)
+2
-0.5
Two events $$A$$ and $$B$$ have probabilities $$0.25$$ and $$0.50$$ respectively. The probability that both $$A$$ and $$B$$ occur simultaneously is $$0.14$$. Then the probability that neither $$A$$ nor $$B$$ occurs is
A
$$0.39$$
B
$$0.25$$
C
$$0.11$$
D
none of these
2
IIT-JEE 1980
Subjective
+3
-0
Give the MKS units for each of the following quantities.

(i) Young's modulus

(ii) Magnetic Induction

(iii) Power of a lens

3
IIT-JEE 1980
True or False
+1
-0
A rocket moves forward by pushing the surrounding air backwards.
A
TRUE
B
FALSE
4
IIT-JEE 1980
MCQ (Single Correct Answer)
+3
-0.75
A block of mass 2 kg rests on a rough inclined plane making an angle of $$30^\circ $$ with the horizontal. The coefficient of static friction between the block and the plane is 0.7. The frictional force on the block is
A
9.8 N
B
0.7$$ \times $$9.8$$ \times $$$$\sqrt 3 $$ N
C
9.8$$ \times $$$$\sqrt 3 $$ N
D
0.7$$ \times $$9.8
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