If a capacitor's dielectric constant is vacuum its dielectric constant is k will be equal to 1.
<u>Explanation:</u>
Relative permittivity of a dielectric substance is referred to as its dielectric constant. Relative permittivity/dielectric constant k is a dimensionless quantity that is the ratio of absolute permittivity and vacuum permittivity.
It is given by the expression
k=k=ε /ε0
where ε denotes absolute permittivity and ε0 denotes permittivity of vacuuum.
Absolute permittivity ε of vacuum= ε0
therefore k= ε0/ ε0=1
dielectric constant of vacuum is 1 .
Answer:
D.
Explanation: Both have shapes determined by gravitational forces.
Answer:
The shear deformation is
.
Explanation:
Given that,
Shearing force F = 600 N
Shear modulus 
length = 0.700 cm
diameter = 4.00 cm
We need to find the shear deformation
Using formula of shear modulus



Put the value into the formula


Hence, The shear deformation is
.
Because plastic and rubber are insulators.
C. Electrical current increases as resistance decreases