`(19)^(12)xx(19)^8-:(19)^4=(19)^?` `6` b. `8` c. `12` d. `24`

(12xx19)+(13xx8)=(15xx4)+?

Evaluate: (i) .^(12)C_(1)+.^(12)C_(2)+.^(12)C_(3)+ . . .+.^(12)C_(12) (ii) .^(19)C_(3)+.^(19)C_(5)+.^(19)C_(7)+ . . .+^(19)C_(19) .

{(1/3)^(-3)-(1/2)^(-3)}-:(1/4)^(-3) = (19)/(64) (b) (64)/(19) (27)/(16) (d) (-19)/(64)

151 xx 8 + (228 div 19)^(2)=?

The value of charge on the oil droplets experimentally observed were -1.6 xx 10^(-19), - 2.4 xx 10^(-19) and - 4xx10^(-19) C. The value of electronic charge, indicated by these results is (1) -1.6 xx 10^(-19) (2) -2.4 xx 10^(-19) (3) -4 xx 10^(-19) (4) - 0.8 xx 10^(-19)

(16(2)/(5)-12(1)/(15))-:3(4)/(81)=?( a) 1(9)/(19) (b) 1(9)/(13)(c)2(8)/(13) (d) 3(2)/(19) (e) None of these

While doing his experiment, Millikan one day observed the following charges on a single drop (i) 6.563 xx 10^(-19) C (ii) 8.204 xx 10^(-19) C (iii) 11.50 xx 10^(-19) C (iv) 13.13 xx 10^(-19) C (v) 16.48 xx 10^(-19) C (vi) 18.09 xx 10^(-19) C From this data the value of the elementary charge (e) found to be

Which part contains the fractions in ascending order? (11)/(14),(16)/(19),(19)/(21) (b) (16)/(19),(11)/(14),(19)/(21) (c) (16)/(19),(19)/(21),(11)/(14) (d) (19)/(21),(11)/(14),(16)/(19)

(1)/(4)xx sqrt ([(12.1)^(2)-(8.1)^(2)] div [(0.25)^(2)+(0.25)(19.95)]) .