Πανελλήνιος...

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  • 2010 , ,

    B 1 8

    B

    6 2010

    1

    A. 20 . ;

    (1) 15 (2) 40 (3) 60 (4) 80 (5) 100

    . 4,5 mg 30 nC, 4,0 m/s 25 cm. ; 0=8,85 10

    -12C2/Nm2. -. . L x. - Bx = 3B, By = - 2B, and Bz =B, . L,I ; . , C , - S -; .

    2

    . 9V. -

    .

    V

    3 5

    1 12

    24

    + - = r 2

    A

    B

    CS

  • 2010 , ,

    B 2 8

    .

    300

    5 L

    .

    75cm2

    . -

    105 Pa

    300 .

    () .

    m

    -

    -

    , (),

    7L.

    300 . H -

    g=9,81 m/s2. .

    3

    A. ,

    , =30 cm l =6 mm.

    i. Coulomb -

    F .

    ii. F 1510-3

    F=2

    1QE0 (Q 0

    ),

    .

    iii. ,

    =51

    .

    B. V0=960 Volt. - . d=5 cm - , =60 . i. ,

    , , , , .

    m kg

    7L

    300K

    5L

    300K

    P=1bar

  • 2010 , ,

    B 3 8

    ii. .

    : me=910-31 kg, qe=1,610

    -19 C.

    . - :

    , (200ml), , , , 50W ( - ).

    .

    - , Q=mc, - c.

    (i)

    , -

    .

    (ii) -

    .

    (iii) . -

    800C 200C, -

    :

    ) 500C, ) 500C , ) 500C

    .

  • 2010 , ,

    B 4 8

    . (LDR) .

    (i) - 3V , . :

    .

    10 Lux.

    (ii) (-) . 10 k .

    10 Lux;

    (iii) 60 lux - . - .

    K

    A

    V 10 k

    (k)

    (lux)

  • 2010 , ,

    B 5 8

    1 :

    A. (1)

    . :

    min

    22

    2

    2

    12

    r

    qKmv

    r

    qK cc =+ rmin=7,76cm

    . F=zL=BIL Fz=BL=2BIL

    F Fz : F= BILFF z 522 =+

    . . S - C. . , C. . .

    2

    A.

    1= =

    91

    9V

    VAB=9A.3=27V

    V=27V+9V

    2= =

    312

    36V

    I4=I1+I2=12A

    VB=12. 5=60V

    V=V+V=36V+60V=96V

    =

    = 424

    963

    VI

    I=I1+I2+I3=9+3+4=16A

    V=-r =V+r=96+16.2=128V.

    V

    3 5

    1 12

    24

    + - = r 2

    1

    1

    2

    3

    4

  • 2010 , ,

    B 6 8

    . :

    P1=P

    :

    molRT

    VPn 20045,0

    3003145,8

    005,010000011 =

    ==

    Boyle

    P1V1=P2V2 :

    P2= PaV

    VP71429

    007,0

    005,0100000

    2

    11 =

    =

    - B :

    P=P2A+mg

    m= kgg

    APP84,21

    )( 2=

    3

    . i. (>>> l ) -

    Coulomb.

    ii. U=2

    1QV

    E0=l

    V V=E0 l

    (1) (2) U= F l , S.I.: U= 1510-3610-3 J U=910-5 J.

    iii. U=2

    1CV2

    U=2

    1C0V

    2

    U=UU , (3), U=(1)U (4) (4) : U=4510-4 J.

    m kg

    7L

    300K

    5L

    300K

    P=1bar

    U=2

    1QV (1)

    F=2

    1QE0 (2)

    U

    U=

    0C

    C

    0C

    C=, : U=U (3)

  • 2010 , ,

    B 7 8

    B.

    i. = 2

    d = R R =

    2

    d (1)

    FL = FK qeU0B =R

    Ume2

    0 (2)

    (2) R = Bq

    Um

    e

    0e

    (3)

    (1) (3) = e

    0e

    qd

    U2m

    (4)

    qeV0 = 2

    1 me

    2

    0v v0 = e

    e

    m

    Vq 02 (5)

    (4) )5(

    = d

    2

    e

    e

    q

    Vm 02 (6)

    (6) S.I.

    = 3,6 10-3 Tesla.

    ii. MA,KE = , , = 2

    1m 20v

    2

    1m 20v

    MA,

    KE = 0

    = = + ( ) :

    | | = AM2

    A

    2

    M 60P2PPP ++ , = = mev0,

    | | = 202

    e

    2

    0

    2

    e vmv2m + | | = mev0 3 (7)

    (7) )5(

    | | = 0ee Vq6m (8)

    (8) S.I.

    | | = 28810-25 kgs

    m

    A.

    (i)

    - .

    - .

    - m=M-Mk

    - .

    - 1 .

    - .

    - .

    - 700C - .

    A A

    d

    M

    Br

    K

    v0

    v0 AP

    AP

    MP

    FL

    R

    FL

    O

    P

    X

  • 2010 , ,

    B 8 8

    - 2 , t - .

    , - :

    mc(2-1)=Pt c , :

    c=)( 12 TTm

    Pt

    (ii)

    -

    - .

    - .

    (iii) .

    B.

    (i) 10 lux 5k.

    hm = mA6,05

    3==

    k

    V

    R

    E

    (ii) H R=15k. =3/15k=0,2mA

    hm :

    V=IR=0,2mA 10k=2V

    (iii) 10k - 10 k - .